Endress+Hauser iTEMP TMT162 - Wiring and Connections; Connection Conditions and Precautions; Connecting the Sensor

iTEMP TMT162 Electrical connection
Endress+Hauser 15
5.3 Connecting the measuring device
5.3.1 Cable gland or cable entry
L
CAUTION
Risk of damage
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Switch off power supply before installing or connecting the device. Failure to observe this
may result in the destruction of parts of the electronics.
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If the device has not been grounded as a result of the housing being installed, we
recommended grounding it via one of the ground screws. Observe the grounding concept of
the plant! Keep the cable shield between the stripped fieldbus cable and the ground
terminal as short as possible! Connection of the functional grounding may be needed for
functional purposes. Compliance with the electrical codes of individual countries is
mandatory.
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If the shielding of the fieldbus cable is grounded at more than one point in systems without
additional potential matching, mains frequency equalizing currents can occur that damage
the cable or the shielding. In such cases, the shielding of the fieldbus cable is to be
grounded on one side only, i.e. it must not be connected to the ground terminal of the
housing. The shield that is not connected should be insulated!
• The terminals for the fieldbus connection have integrated reverse polarity protection.
• Cable cross-section: max. 2.5 mm²
• A shielded cable must be used for the connection.
Follow the general procedure. →  12.
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A0010823
 5 Connecting the device to the fieldbus cable
1 Fieldbus terminals - fieldbus communication and power supply
2 Shielded fieldbus cable
3 Ground terminals, internal
4 Ground terminal (external, relevant for remote version)